17-18 psi D-1SC Procharger
02-09-2009, 01:50 AM
#28
Let us know what it does on the dyno, I'm assuming stock block casting? Which twins do you have, 3.5 or 4.5"? I saw 14.7 psi converted from the kPa reading with my 7.65/3.7 combo on my 396. I just put in a 3.4 pulley and am hoping for a few more psi, but I'm not sure so we'll see. No meth though but I will be running race gas.
Any pictures of how you modified the plenum? I'll probably need to do the same thing. Also, my IAT's were fine at my old boost level so I think the twins are doing ok.
Any pictures of how you modified the plenum? I'll probably need to do the same thing. Also, my IAT's were fine at my old boost level so I think the twins are doing ok.
02-09-2009, 06:49 AM
#30
Let us know what it does on the dyno, I'm assuming stock block casting? Which twins do you have, 3.5 or 4.5"? I saw 14.7 psi converted from the kPa reading with my 7.65/3.7 combo on my 396. I just put in a 3.4 pulley and am hoping for a few more psi, but I'm not sure so we'll see. No meth though but I will be running race gas.
Any pictures of how you modified the plenum? I'll probably need to do the same thing. Also, my IAT's were fine at my old boost level so I think the twins are doing ok.
Any pictures of how you modified the plenum? I'll probably need to do the same thing. Also, my IAT's were fine at my old boost level so I think the twins are doing ok.
I have the 3.5" twins right now......but I am working on a front mount........not because I am worried about iat's (I spray alot of meth) but I am sure it is a restriction.......I am also trying to switch over from mid length headers to 1 7/8" long tubes.......going on the dyno right after I finish
I can get pics of my plenum box sometime this week, its off the car right now. If you plan on running 15+ psi with the twin's, make sure you have a good bypass....otherwise every time you let off the gas you will blow plenum box
Even with the procharger race bypass I had to modify the plenum box to keep it together 
02-09-2009, 04:44 PM
#32
I have the 3.5" twins right now......but I am working on a front mount........not because I am worried about iat's (I spray alot of meth) but I am sure it is a restriction.......I am also trying to switch over from mid length headers to 1 7/8" long tubes.......going on the dyno right after I finish
I can get pics of my plenum box sometime this week, its off the car right now. If you plan on running 15+ psi with the twin's, make sure you have a good bypass....otherwise every time you let off the gas you will blow plenum box Even with the procharger race bypass I had to modify the plenum box to keep it together
I can get pics of my plenum box sometime this week, its off the car right now. If you plan on running 15+ psi with the twin's, make sure you have a good bypass....otherwise every time you let off the gas you will blow plenum box
Even with the procharger race bypass I had to modify the plenum box to keep it together
